Honing rotor for internal cylinders



Nov. 19, 1957 R. s. LA JEUNESSE HONING ROTOR FOR INTERNAL CYLINDERS Filed Jan. 6, 1956 INVENToR.

HONING ROTOR FOR INTERNAL CYLINDERS Russell S. La Jeunesse, Wheaton. lll., assignor of one-half to Harry Rudolph Carlson, Oak Park, Ill.

Application January 6, 1956, Serial No. 557,678

12 Claims. (Cl. 51-184.3)

` This invention relates to a new and improved honing rotor for internal cylinders.

The honing of internal cylinders and particularly long `tubes have presented manufacturing problems for many years. Maintaining an internal cylinder concentric about a center line has been extremely difficult. Hones previously in existence have invariably caused out-of-round `of hones are urged with equal and uniform force out- 1 wardly against the internal surface of `a cylinder to be honed.

Still another important object of this invention is the provision of means in a honing rotor for moving a plurality of hones radially outwardly by air pressure for a uniformity of hone spreading and a smoothly honed internal cylinder upon rotation of the entire honing rotor therewithin.

Another important object of this invention is to supply a honing` rotor having a plurality of radially disposed hones therein and having a cylinder and piston located centrally of the honing rotor and arranged and constructed to radially spread `the plurality of hones by air or otherfluids under pressure.

Another and still further important object of this intes Patent .fa

vention is to equip a honing rotor with iluid cylinder l and piston means centrally located within the rotor and adapted to move frusto-conical members in a longitudinal direction at each end of the rotor which cooperate with angled surfaces `of a plurality of radially disposed and circumferentially spaced apart `hone members whereby the hones are spread radially outwardly of the rotor by the admission of iluid under pressure to the centrally disposed cylinder.

Still another important object of this invention is to provide a honing rotor for internal cylinders of any length and wherein there is used a plurality of radially disposed circumferentially spaced apart hone members moved uniformly outwardly by fluid under pressure entering the hone rotor` through the axis of rotation thus permitting any length drive shaft to be applied thereto;

. Other and further important objects and advantages of this invention will become apparent from the disclosures in the following specification and accompanying drawings.

In the drawings:

. Figure l is a side elevational view of the internal cylindrical hone of this invention shown within a cut-a-way tube.

Figure 2 islan enlarged sectional view of the internal cylindricalhone of thisinvention.

t Patented Nov. 19, 1957 Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

Figure 4 is a perspective view detail of one of the hone .guides as used in this device.

Figure 5 is a sectional view detail taken on the line 5--5 of Figure 1.

As shown in the drawings:

The reference numeral 10 indicates generally a tube or other internal cylinder `to be internally honed. The hone device or rotor of this invention is shown at 11 and comprises the entire hone rotor which includes a cylindrical base member 12`and an end 13 fastened thereto by bolts 14. The other end 15 of the hone rotor is equipped with a threaded portion 16 adapted to engage a threaded socket 17 in the end of the base member 12.

The cylindrical base member of the rotor has an internal chamber 18 adjacent the end 13 and a similar internal chamber 19 adjacent the end 15. A central chamber 20 is located within the cylindrical base member between the end chambers 18 and 19.

As best shown in Figure 3 the cylindrical base member is equipped further with four arcuately spaced apart radially disposed elongated passages 21, 22, 23, and 24. These radial passages within the base member 12 snugly receive elongated slides 25, 26, 27, and 28 respectively. It will be subsequently disclosed how the slide members carry the actual hones or abrasive stones to polish or grind internal annular surfaces when the entire rotor 11 is rotated within a tube such as that shown at 10.

A wall or plug 29 threadedly engages the cylindrical base between the central chamber 20 and the end chamber18.V Similarly a wall or plug 30 threadedly engages the base between the central chamber 20 and the other end chamber 19. A small aperture 31 is disposed centrally of the plug 29 and similarly a small aperture 32 in alignment with the aperture 31 is positioned within the plug 30. The central chamber 20 within the base 12 is adapted to function as a lluid cylinder to receive therewithin a pair of pistons 33a and 33b. A piston rod 34 is adapted to be affixed to and project laterally from the piston 33a for slidable mounting and guiding within the small aperture 31 within the wall or plug 29. Similarly a piston rod 35 is aixed to and extends laterally from the piston 33b where it is slidably mounted and guided within the small aperture 32 in the wall or plug 30. A11 annular groove 36 in the piston 33a is adapted to receive a rubber O ring seal 37 which contacts the inner annular periphery of the central cylindrical chamber 20. Another annular groove 38 is formed in the outer circumference of the piston 33b and similarly carries a rubber O ring seal 39. Here again the rubber O ring 39 contacts the inner annular cylindrical wall of the central chamber 20 for sealing relationship between the piston and the cylinder.

Within the chamber 18 in one end of the cylindrical base 12 is positioned a frusto-conical member 40 which is ixedly attached to the outer end of the piston rod 34. The other end of the cylindrical base is symmetrically designed so that within the chamber 19 there is positioned a frusto-conical member 41 which is fixedly attached to the outer end of the piston rod 3S. An outer reduced diameter extension 42 of the wall or plug 29 extends into the enlarged chamber 18 within the cylindrical base around the piston `rod 34 and adjacent the frusto-conical member 40. Similarly an outer reduced diameter extension 43 of the wall or plug 30 extends into the chamber 19 around the piston rod 35 and adjacent the frustoconical member 41. A spring 44 surrounds the extension 42 and extends between the wall or plug 29 and the frusto-conical member 40. The spring 44 thus normally urges the truste-conical member 40 outwardly.` A spring 45 surroundsthe-extension 43 and is positioned between edly engages with the extension 54.

the wall 30 and the frusto-conical member 41. As in ther kprovided 'within the reduced diameter extension 43 to receive a rubber ring seal 49. Thus the rubber O ring seals 47 and 49 are annularly disposed around the piston rods 34 and 35 respectively to provide for effective fluid sealing between the rods and the extensions. A spaced apart internal annular groove l50 in the extension 42 is .adapted to receive a seal member 51 to preventydust or other foreign matter from entering the piston or piston chamber 20. Similarly a spaced apart internal annular groove 52 is formed in the extension 43 in order to receive a seal or wiping member 53 on the piston rod -35 to thus prevent passage lof ldust or other foreign matter to the piston or cylinder 20.

The end cap 15 is provided with an endwise projection 54 in the form of an externally threaded extension to receive the attachment of a .drive shaft which thread- The drive shaft 55 is provided with a central opening 56 for the passage of fluid under pressure to be delivered to .the honing rotor for causing the hone members to spread uniformly around the periphery of the rotor as will hereafter be described. The projection 54 on the end cap 15 is Vequipped with a similar central passage 57 which is in alignment with the passage S6 in the drive shaft and constitutes a longitudinal extension thereof. A radial passage 58 is formed in the cap 15 and joins `the passage .57 which runs longitudinally of the cap. A plug 59 is positioned in the outer extremity of the passage y58 and thus the radial passage 58 `is sealed off just short of the circumferential exterior of the honing rotor. Another longitudinally extending passage 60 in the cap 15 joins with the outer effective end of the radial passage 58 and extends inwardly toward the main portion of the honing rotor. An aligned longitudinally extending passage 61 in the cylindrical base member 12 forms a continuation of the passage 60 within the cap 15 and thus provides for the delivery of fluid under pressure from the drive shaft 55 to a position substantially centrally of the honing rotor. Spaced apart radial passages 62 and 63 near the center of the base 12 respectively join the outer ends of the central cylindrical chamber 20 and the longitudinally extending passage 61. Plugs 64 and 65 close the outer ends of the radial passages 62 and 63 thus providing for a closed fluid passage from the drive shaft 55 to both ends of the central cylinder 20. An annular recess 66 is provided around the small diametered passage 61 adjacent the cap 15. A sealing member 67 in the nature of a rubber O ring is positioned within the annular recess 66 and projects outwardly therefrom to form a fluid seal between the yend cap 15 and the cylindrical body 12. This, of course, insures against 4leakage of fluid under pressure between the end cap 15 and the body 12 of the honing rotor.

Diametrically disposed recesses 68 and 69 are formed in the outer end of the cap 15 spaced outwardly from the endwise projection S4. The drive shaft 55 includes endwise projections 70 and 71 which engage the recesses 68 and 69 respectively to effect a positive rotor drive between the drive shaft 55 and the honing rotor. Thus there need be no dependence upon the threaded engagement of the drive shaft 55 with the projection 54 to effect rotational drive of the rotor. The projections 70 and 71 are in the nature of set screws having heads 70a and 71a respectively which engage an .annular shoulder 55a on the drive shaft. This of course enables the drive shaft to be removed from the honing rotor merely by retracting the set screws or projections 70 and 71 after which the .drive shaft 55 may be turned off the the honing rotor.

The slides 25, 26, 27, and 28 are formed with angled surfaces 72 and 73 positioned adjacent the inner sides and the ends thereof. (No attempt has been made to separately designate the angled surfaces of each of the several slides with other than the general numerals 72 and 73.) The angled surfaces 72 and 73 of each of the slides 25 to 28 inclusive cooperate with the frusto-conical members 40 and 41 respectively to cause a simultaneous outward movement of each of the slides 25 to 28 inclusive as the frusto-conical members 40 and 41 are drawn inwardly toward the center of the honing rotor by reason of fluid under pressure entering the ends of the cylinder 20 and forcing the pistons 34 and 35 inwardly of the cylinder 20. Similarly when the fluid under pressure or compressed air is cut off and the fluid already in the cylinder 20 is allowed to escape outwardly through the several passages and thence out the drive shaft passage the springs which normally urge the frusto-conical members at each end thereof cause such outward urging and thus permit the slides 25 to 28 inclusive to be drawn inwardly by means to be subsequently described.

Each of the slides 25 to 28 inclusive is equipped with grooves 74 and 75 which extend across the side faces thereof and are spaced apart lengthwise of the slides. These grooves or channels form guides for the slides within the base member 12. A guide plate 76 shown in detail in Figure 4 is equipped with holes 77 for the purpose of attachment to the cylindrical base 12 adjacent each side of the four equally spaced radial passages 21, 22, 23, and 24 by means of screws 78. The guide plates are further provided with spaced apart lateral projections 79 and 80. These projections extend inwardly of the radial projection 54 on the end cap 15 of 4passages and engage the vertical grooves or channels 74 and 75 respectively in the sides of the slide members. Thus the slides are properly guided for only translational movement within the radial passages and cocking of the slides is reduced to a minimum. This means of course that the hones which will be carried by the slides will move outwardly -uniformly along their length to thus enable uniform grinding or honing of an internal cylinder.

Elongated hones or abrasive stones 81, 82, 83, and 84 are provided for each of the -elongated slides 25, 26, 27, and 28. It should be understood that the use of the word hone in this specification means any surface treating stone or device. Supporting members 85, 86, 87, and 88 respectively carry the hones and provide for the attachment to the slides 25 to 28. Each of these support members include a base 89 which extends the length of the top or outer edge of the slide and lies substantially flat thereon. 'Ihe base -89 carries a hone by means of cement or other adhesive. Extending radially inwardly from the base on both sides thereof are spaced apart side flanges 90 and 91 which form a channel type of engagement for the sides of the top part of the slides. Radially outwardly extending spaced apart pairs of side flanges 92, 93, and 94 -are interrelated with the inwardly extending flanges 90 and 91 and form a channel to receive the hones 81 to 84 inclusive.

The base member 89 has end extensions 95 and 96 in the form of hooks to receive annular coil springs 97 and 98 which extend around the rotor and engage the hooks and 96 on each of the ends of the hone supports 85 to 88 inclusive. It is these annular springs 97 and 98 which hold the slides 25 to 28 inwardly against the frustoconical members 40 and 41 and also are the means of returning the slides radially inwardly when the fluid under pressure is exhausted and the longitudinally acting springs 44 and 45 move the frusto-conical members longitudinally outwardly thereupon permitting inward movement of each of the slides.

The hone supports 85 to 88 inclusive are further lprovided with radially inwardly extending guide pins 99 and 100 which are integral with the base '89. 'Thepins 99 and 100 slidably engage spaced apart sockets 101 and 102 in the tops of each of the slides 25 to 28 inclusive.

In the operation of the honing rotor of this invention air or other uid under pressure is admitted to the central passage 56 in the drive shaft 55 to thereupon pass in succession from the drive shaft passage to the passage 57 in alignment therewith and within the cylindrical body 12 of the honing rotor. From there the air pressure is delivered radially outwardly through the passage 58 and thence longitudinally through aligned passages 60 and 61 whereupon the fluid under pressure is directed radially inwardly at spaced points through the passages 62 and 63 adjacent each end of the central ohamber within the honing rotor. Such admission of uid under pressure causes the pistons 34 and 35 to move centrally of the cylinder chamber 20 and simultaneously pulling with them through the medium of the piston rods the frusto-conical members 40 and 41. Suitable rubber O rings and sealing members are positioned around the pistons and the piston rods to provide adequate sealing and `dirt excluding means for the iiuid system of this invention. The movement of the frusto-conical members inwardly against the action of the longitudinally and outwardly urging springs 44 and 45 will as previously stated cause an outward urging of each of the hone carrying slide members to 28. It is the cooperation of the angled surfaces of the frusto-conical members engaging the angled surfaces 72 and 73 of each of the slide members that causes this outward extension of the slides. As the drive shaft 55 is rotated and the screws or projections 70 and 71 engage the recesses 68 and 69 in the end of the cap 15 the honing rotor is rotated by means externally of the internal tube to be honed or otherwise ground. Simultaneously with the rotation of the honing rotor within an internal cylinder to be honed, air or other duid under pressure may be admitted through the series of passages starting with the central passage 56 in the drive shaft to cause an outward urging of the hones 81 to 84 inclusive. The degree of liuid under pressure admitted will of course control the amount of outward urging force with which each of the hone members 81 to 84 contacts the inner annular cylindrical surface to be honed. Obviously then the hones may be regulated by suitable gauge means to insure a proper honing of the internal cylinder. The hones are restricted to uniform outward translational movement by means of the guiding of the slides and the simultaneous outward urging of the opposite ends of the slides by means of the symmetrical frusto-conical members engaging symmetrical angled surfaces on each of the slides. In view of the above there is thus insured a uniform and concentric honing of any internal cylinder desired. It is a particular feature of this invention to enable honing of any length of tube or internal cylinder because the drive shaft may be made any length desired without having any concern for mechanical elements to be extended therethrough to actuate the radial outward urging of the multiple hones disposed around the honing rotor. In the present instance it is merely necessary for the drive shaft to have an elongated hole therethrough to permit passage of air or uids under pressure to be admitted to the honing rotor as previously described.

The honing rotor is constructed of a minimum of parts and is of lightweight construction. This permits honing in a horizontal plane as well as the usual vertical plane without causing any eccentricity of the finished internal cylindrical surface.

Numerous details of construction may be varied throughout a wide range without departing from the principles disclosed herein and I therefore do not propose limiting the patent granted hereon otherwise than as necessitated by the appended claims.

What is claimed is:

1. A honing rotor comprising a cylindrical base, a uid cylinder positioned substantially centrally of said cylindrical base, said cylindrical base having chambers therein 6 adjacent the ends thereof and on both sides of said uid cylinder, a wall means at each end of said duid cylinder spacing said fluid cylinder and each of said end chambers, pistons mounted in said fluid cylinder, each of said pistons having a piston rod integral therewith and extending in opposite directions through said wall means and into said end chambers, a frusto-conical member affixed to the end of each piston rod and located in each of said end chambers, a plurality of elongated radially disposed slide members mounted in said cylindrical base at arcuately spaced apart positions around said cylindrical base, each of said slide members having angled surfaces adjacent their inner sides and ends, said angled surfaces of the slide members projecting within said end chambers and cooperating with said frusto-conical members, means to admit iiuid under pressure to opposite ends of said fluid cylinder, and hones carried by said slide members.

2. A device as set forth in claim l in which the means to admit fluid under pressure to said fluid cylinder includes said cylindrical base having passages therein.

3. A device as set forth in claim l in which there is included a drive shaft attached to one end of said rotor and adapted to effect rotation thereof.

4. A device as set forth in claim 3 in which the means to admit uid under pressure to said uid cylinder comprises said drive shaft having a central passage therethrough and said cylindrical base having passages therethrough communicating with said central passage of the drive shaft and opposite ends of said fluid cylinder.

5. A device as set forth in claim l in which said elongated radially disposed slide members have laterally spaced apart grooves in the sides thereof extending from the inner edges to the outer edges, and guide means on said cylindrical base including inward projections engaging said slide member grooves to insure translational movement of said slide members.

6. A device as set forth in claim l in which said slide members have hone supports mounted on the tops thereof.

7. A device as set forth in claim 6 in which said hone supports include a base member extending the length of the outer edge of said elongated radially disposed slide members, radially inwardly extending anges on both sides thereof for snugly engaging the sides of the slide members, and radially outwardly extending flanges on both sides thereof for snugly engaging the sides of hone members.

8. A device as set forth in claim 7 in which the inwardly and outwardly extending side anges are interrelated being alternately in and out.

9. A device as set forth in claim 7 in which the hone supports further include hooks projecting from the ends of the base member.

i0. A device as set forth in claim 9 in which annular spring means are positioned around the honing rotor at the ends thereof and within the hooks of each of said hone supports for urging the slide members and their hones radially inwardly.

ll. A device as set forth in claim 1 in which spring means are positioned within said cylindrical base for normally urging said frusto-conical members longitudinally outwardly.

l2. A device as set forth in claim 11 in which annular spring means are carried around the circumference of the honing rotor at laterally spaced apart positions and on said slide members whereby the annular springs normally urge said slide members radially inwardly.

References Cited in the le of this patent UNITED STATES PATENTS 1,886,584- Prange Nov. 8, 1932 1,918,852 Marx July 18, 1933 2,343,500 Fairbairn Mar. 7, 1944 FOREIGN PATENTS 609,783 Germany Feb. 23, 1935 

